Pulp and paper having increased brightness

Details Pulp and paper having increased brightness Pulp and paper having increased brightness

D - Textiles, Paper

21

C

D21C 9/00 (2006.01)

Patent

CA 2601926

The present disclosure describes a method of making pulp and/or a paper substrate. The method comprises bleaching/extracting a plurality of Kraft fibers with a chlorine based bleaching agent for the final time , washing the plurality of bleached Kraft fibers after bleaching/extracting, and, after washing, contacting a the plurality of bleached Kraft fibers in solution with at least one optical brightener during or after non-chlorine bleaching/extracting and prior to both a blend chest stage and a machine chest stage.

L'invention concerne un procédé visant à accroître la blancheur d'une pâte à papier, la pâte à papier produite à l'aide de tels procédés et des procédés d'utilisation de cette pâte.

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